HEIDENHAIN CNC PILOT 640 User Manual page 333

DIN/ISO programming | Contour-based turning cycles
Cycle run (with Q = 0 or 1):
1 Calculates the areas to be machined and the cutting segmentation
2 Approaches workpiece for first pass from starting point, taking the
safety clearance into account
Radial recess: First Z, then X direction
Axial recess: First X, then Z direction
3 Executes first cut (recessing)
4 Machines perpendicularly to recessing direction (turning)
5 Repeats 3 to 4 until the complete area has been machined
6 If required, repeats 2 to 5 until all areas have been machined
7 If Q = 0: Finish-machines the contour
Machining information
Transition from turning to recessing: Before the transition from
turning to recessing, the control retracts the tool by 0.1 mm. Thus
an offset cutting edge is adjusted for the recessing operation,
independent of Offset width B
Inside radii and chamfers: Depending on the recessing width and
the radii of rounding arcs, single cuts preventing a fluid transition
from recessing to turning are executed before the rounding is
machined. This prevents damage to the tool.
Edges: Edges are recessed. This prevents residual rings.
HEIDENHAIN | User's Manual smart.Turn and DIN Programming | 12/2017
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